Deciding to go to therapy is a very positive and self-caring step to take in your life. Good for you.
I've been through three different "bouts" of therapy and found each of them to be very helpful in sorting out various things going on with me at the time. (Frankly, I sort of think everyone would benefit from having some therapy. ) And while it may occasionally be emotional, therapy doesn't hurt or and it doesn't take huge amounts of time, so why not? The thing about therapy is that it is mostly a chance for YOU to talk. The benefit is that you get to talk with someone who is only there to help you sort out what you need and want and feel. Therapists don't have opinions about what you should do and aarent there to advise you on decisions. What therapists do is LISTEN very careful so that they can remind you when, for instance, something you say today about your boyfriend is similar to something you said a while ago about your Mom. Or when you are hating something today, they can remind you that you were praising it last month. That doesn't tell you what to do, but it helps to FOCUS and BALANCE your sense of how you think and feel about emotional things. So you are in a better place to make choices and decisions without the sense of being overwhelmed. Or to understand why you feel certain ways sometimes. It doesnt solve everything, but you should feel less rocky.
Finally, once in a while, a patient doesn't connect with the therapist. If you feel like that, talk to the therapist about it, it isn't a criticism or sin. And then feel free to look for someone else and/or ask for a reference to another therapist.